Bar-edging sewing-machine.



F. WEVER.

BAR EDGING SEWING MACHINE.

APPLICATION FILED AUG-26, I913.

1,210,125. Patented Dec. 26,1916.

5 SHEETS-SHEET 1.

' F. WEVER.,

BAR EDGING SEWING MACHINE.

APPLICATION FILED AuG.26. 19-13.

Patented Dec. 26, 1916.

F. WEVER.

BAR EDGING SEWING MACHINE.

APPLICATION FILED Aus.26. 19x3.

1 ,210, Patented. Dec. 26, 1916.

5 SHEETS-SHEET 3- 9 I 29 1 J t a m 2 2v 7 v J2 -:11 r g y 2 2 0? gy s,

F. WEVER. BAR EDGING SEWING MACHINE. APPLICATION FILED AUG.26, 1913.

Patented Dec. 26, 1916.

5 SHEETSSHEET 4- F. WEVER.

BAR EDGING SEWING MACHINE.

APPLICATION FILED Aue.26, 1913.

Patented Dec. 26, 1916.

5 SHEETS-SHEET 5- UNITED STATES P FRITZ WEVER, 0F STUTTGART, GERMANY, ASSIGNOR '10 UNIQN SPECIAL M ASCHINEN- FABRIK, G. M. B. H., 0F STUTTGART, GERMANY, A CORPORATION OF GERMANY.

BAR-EDGING SEWING-MACHINE.

Specification of Letters Patent. Patented Dec. 26, 1916.

Application filed August 26, 1913. Serial No. 786,731.

To all whom it may concern:

Be it known that T, FRITZ WEVER, a subject of the Emperor of Germany, residing at Stuttgart, in the Kingdom of Wurttemberg, Germany, have invented certain new and useful Improvements in Bar-Edging Sewing-Machines, of which the following is a description, reference being had to the accompanying drawing and to the figures of reference marked thereon.

The invention relates to new and useful improvements in sewing machines for forming an edging and stitching the same to a body fabric.

An object of the invention is to provide a plurality of pairs of needles and cooperating thread laying devices and also a separate thread laying device for forming connecting loops or threads for joining the groups of loops made by the different pairs of needles.

A further object of the invention is to provide a machine of the above character with a thread guide for forming an edging loop or scallop which is secured by one of the groups of loops formed by one pair of needles.

These and other objects will in part be obvious and will in part be hereinafter more fully described.

In the drawings :Figure 1 is a front view of a sewing machine embodying my improvements; Fig. 2 is a view, partly in section and partly in plan, of the parts immediately above the work support; Fig. 3 is an end view of the machine, certain of the parts being omitted for the sake of clearance; Fig. 4 is a view, partly in section and partly in end elevation, showing the means for operating the thread guides; Fig. 5 is a view, partly in section and partly in top plan of the machine; Fig. 6 isa perspective view showing the needle head, the needles and one of the thread laying devices which cooperates with one pair of needles; Fig. 7 is a view showing diagrammatically the thread guides and the purpose of each thread guide; Fig. 8 is a diagrammatic view showing the relative movements of the thread guides and their relation to each other; Fig. 9 is a plan view showing the finished edging made in accordance with the diagrammatic views shown in Figs. 7 and 8; Fig. 10 is a diagrammatic vlew, showing the thread guides operated to join two fabric sections; Fig. 11 is a plan view of two fabric sections joined in accordance with the diagrammatic illustration in Fig. 10; Fig. 12 is a View showing diagrammatically the relative position of the fabric, the looper thread loops and the thread guide loops and also the edging loop; Fig.- 13 is a detail showingmore or less diagrammatically needles, the work support and the loopers which cooperate with the needles.

The invention, as shown in the drawings, is embodied in a sewing machine consisting of a frame 1 carrying a main shaft 2 which is operated by the usual driving pulley 3. On the main shaft is an eccentric 4 which operates through an eccentric strap 5 to oscillate a needle lever 7 pivoted at 6 to the overhanging arm of the machine. Said needle lever is connected by a link 9 to the needle bar 8. At the lower end of the needle bar is a needle head 10 which carries the needles. In the present embodiment of the invention, the said needle head is provided with four needles arranged in two pairs 11-11 and 12-12. dle threads 13 pass through suitable tensions 15 and guides 16 to the needles 1111, while the needle threads 14 pass through suitable tensions 15 and guides 16 to the needles 1212. Cooperating with the needles ll, 11 beneath the work support is a looper L, while a looper L cooperates with the needles 12, 12. These loopers are of the usual construction and make the well known twin needle stitch. The loopers are mounted on a looper carrier which is oscillated by a looper rod 18 which, in turn, is connected to the needle lever extension. Each looper is a thread carrying looper and enters the loops of both needles of the pair with which it cooperates so as to form connecting loops between the lines of stitching. The looper threads 62 form in (See Fig. 6). The nee-' connection with the needle threads 13 and 14 the lower layer of loops or threads F, see

thread guide 19 coiiperates with the pair'of needles 11-11, and this thread guide is arranged to oscillate over the throat plate 17. The thread 21 guided by said thread guide is laid back and forth in front of the pair of needles and is stitched down by the needle threads crossing over the same. Coiiperating with the pair of needles 1212 is a thread guide 20 carrying a thread 22, which is likewise laid across from one needle to the other of the pair and is stitched down by the needle threads 14. The thread guides 19 and 20 are operated from the main driving shaft through a gear 23 which meshes with a gear 25 on a shaft 24. An eccentric 26 carried by the shaft 24 is connected through an eccentric rod 27 to an arm 28 on a shaft 29 mounted in suitable hearings in the overhanging arm. At the other end of the shaft 29 there is a crank 30 to which is connected a link 31. The link 31 is also connected to an arm extending laterally from the vertical shaft 32 mounted in suitable bearings the head of the machine. This shaft 32 carries the lever 33 on which is mounted the thread guide 19, so that the rocking of the shaft 32 will oscillate the guide 19 in front of the needles 11-11. The operating gears are so proportioned that the thread guide 19 is moved laterally once for each complete reciprocation of the needle so that loops of thread B are laid back and forth and held by the needle threads 13.

-The guide 20 is carried by the lever 58. This lever 58 is losely mounted on the shaft 61 and turns about the same as an axis. Said lever 58 extends in rear of its support and is connected by a link 59 to a rearwardly projecting arm on the lever 33. The movements, therefore, of the shaft 32 will be transmitted through the link 59 to the lever 58, and the thread guides 19 and 20 will, through this mechanism, be moved simultaneously in one direction and then in the other, laying the threads carried by the respective guides back. and forth in front of the respective pairs of needles, in the manner fully illustrated in the drawings.

From the above, it will be apparent that with each pair of needles there is a looper and a thread guide, and these elements cooperate to form connected rows of threads, the distance between which depends u on the distance between the pairs of nee les. The two lines of stitches thus formed are connected by thread loops formed in a thread 34 of an oscillating thread guide 45.

On the shaft 24 there is a gear 35 meshing with a similar gear 35' of arger diameter 40 formed on a lever 44 pivoted at 43 to the V cloth late. The segment 39 carries a pin 41 which runs in the cam groove 42 in the drum 37. This cam groove is so shaped that in each revolution of the drum the toothed segment swings about the pivot 38 and in turn oscillates the segment 40 and the lever 44 to which it is attached. This lever 44 has a forwardly extending arm carrying a thread uide 45 through which the thread 34 is led Said thread guide 45 is oscillated first from one side to the other and cooperates with the inner needles of the respective pairs 11 and 12. The cam groove 42 is so shaped and the shaft 46 is so driven that the guide 45 stops while the fabric is being fed two stitches, then said guide is moved to the other end of its stroke. As a consequence, loops are formed. so that there are at least two stitches between the lines of thread extending from one group of connected loops to the other. In appearance, the edging formed on my machine shows single rungs or bars of the center or crochet thread spaced and connecting the groups of loops formed by the pairs of needles.

In order to form an additional border or ornament at the extreme outer ed e or at the right hand needle of the pair 0 needles 1212, I have provided. a thread uide 48 which carries edging threads 56. T e guide 48 is mounted on a lever 47 which is pivoted at 46 to the work support. This .lever is oscillated by a lever 49. Said lever 47 has a slot 50 in which a pin 51 carried by the lever 49 moves. The lever 49 is mounted on an adjustable pivot 52. A pin 53, carried by the lever 49, engages a cam groove 54 in the drum mounted on the shaft 36; As the shaft 36 rotates, the lever 49 will be oscillated and this, through the pin and slot connection with the lever 47, will oscillate the thread guide 48. The presser foot or a contact detains the edging threads 56 and cotiperates in the positlonin of the same for engagement by the need e.

In the operation of the machine, a fabric A is fed underneath the presser foot, so that one of the needles 11 passes through the,

fabric while the other passes over the edge thereof. Said fabric may be guided by an edge guide 60. The needle loops are joined by a looper beneath the fabric and by the thread 21 above the fabric. The two needles 1212 form loops which are engaged by the looper, and the needle threads also join together the strands of thread 22. The oups of loops joined by the pairs of nee les 11 gamma and 12, respectively, are connected by the bars G formed from the thread 34.

In Fig. 11 of the drawings, 1 have shown my improved stitch forming mechanism as joining two sections of the abric A and E. The grou s of stitches or loops BB are made in t e manner above referred to, and these are connected by the cross bars 0, also made in the manner stated. This fabric section E may be a lace edging.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. A sewing machine including in combination pairs of needles, a thread carrying looper cooperating with each pair of needles, a thread guide cooperating witheach pair of needles above the work support, and a third thread guide coiiperating with the inside needles of each pair of needles, whereby the groups of loops formed by the respective pairs of needles and their cooperating devices are connected.

2. A sewing machine including in combination pairs of needles, a thread carrying looper cooperating with each pair of needles,

a thread guide cooperating with each pair of needles above the Work support, and a third thread guide cooperating with the inside needles of each pair of needles, where by the groups of loops formed by the respective pairs of needles and their cooperating devices are connected, said third thread guide being timed so that the connecting threads are spaced two or more stitches apart.

3. A sewing machine including in combination pairs of needles, a thread carrying looper cooperating with each pair of needles, :1. thread guide cofiperating with each pair of needles above the work support, a third thread guide cooperating with the inside needles of each pair of needles, whereby the groups of loops formed by the respective pairs of needles and their coiiperatim devices are connected, and a fourth thread laying member cooperating with the outside needle of one pair of needles for forming a scalloped edging.

4. A sewing machine including in combination pairs of needles, a thread carrying looper cooperating with each pair of needles for forming loops connecting the needle loops, a thread guide cooperating with each pair of needles above the work support for forming loops connecting the lines of stitching produced by the respective pairs of needles. independent means for pivotally supporting said thread guides, the pivot for each thread guide being disposed centrally in rear of the pair of needles with which it coiiperates.

5. A sewing machine including in combination a plurality of airs of needles, a thread carrying looper eneath the work support for each pair of needles, a thread gin e cooperating with each pair of needles above the work support, a third thread guide cooperating with the inside needles of each pair, the throw of each thread guide being such that two groups of loops are formed and connected by a thread lying in the plane of the body fabric.

6. A sewing machine including in combination a work support, a main shaft lying beneath the work support, an overhanging arm, a needle bar reciprocating in said over hanging arm and carrying a plurality of pairs 0 needles, a thread guide for each pair of needles, means for supporting said thread guides on said overhanging arm, means for connecting the thread guides whereby they are simultaneously operated in opposite directions, means for oscillating said thread guides, a thread guide cooperating with the inner needles of each pair, means for mounting said thread guide on the work support, and means for oscillating said thread guide.

7. A sewing machine including in combination a work support, a main shaft lying beneath the work support, an overhanging arm, a needle bar reciprocating in said overhanging arm and carrying a plurailty of pairs of needles, a thread guide for each pair of needles, means for supporting said thread guides on said overhanging arm, means for connecting the thread guides whereby they are simultaneously operated in opposite directions, means for oscillating said thread guides, a thread guide cotiperating with the inner needles of each pair, means for mounting said thread guide on the work support, means for oscillating said thread guide, said last-named means including a shaft mounted on the work support in rear of the overhanging arm, means for rotating the shaft from the main shaft of the machine, a cam on said shaft in rear of the overhanging arm. and devices operated by said cam for oscillating said thread guide carried by the work support.

8. A sewing machine including in combination a work support, a main shaft lying beneath the work support, an overhanging arm, a needle bar reciprocating in said overhanging arm and carrying a plurality of pairs of needles, a thread guide for each pair of needles, means for supporting said thread guides on said overhanging arm, means for connecting the thread guides whereby they are simultaneously operated in opposite directions, means for oscillating said thread guides, a thread guide cooperating with the inner needles of each pair, means for mounting said thread guide on the work support, means for oscillating said thread guide, said last-named means including a shaft mounted on the work support in rear of the overhanging arm, means for rotating the shaft from the main shaft 5 of the machine. a cam on said shaft in rear of the overhanging arm. devices operated by said cam for oscillating said thread guide (ill'l'itd by the work support. a fourth thread guide carried by the work support, a second 10 cam on the shaft in the rear of the overture in the presence of two Witnesses.

FRITZ WEVER.

Witnesses:

ERNEST ENTZENMANN, KRIDA T. KLAIBER. 

